Reaction catalyzed by RING-type E3 ubiquitin transferase (2.3.2.27)

	[TEB4-UBC7]-S-ubiquitinyl-L-cysteine	+		ubiquitin-L-lysine48	=		[TEB4-UBC7]-L-cysteine	+		ubiquitin-N6-ubiquitinyl-L-lysine48
	[TEB4-UBC7]-S-ubiquitinyl-L-cysteine	+		ubiquitin-L-lysine48	=		[TEB4-UBC7]-L-cysteine	+		ubiquitin-N6-ubiquitinyl-L-lysine48